Biodiesel (FAME) is often used as a blend with diesel in concentrations up to 5% by volume (B5) in conventional diesel, the blend meets the ASTMD975 diesel specification and can be used in any application as if it were of pure petroleum gas oil. Although not all engine manufacturers have approved the use of these mixtures in their equipment. Mixes B6 through B20 are covered by specification ASTM D7467-15. Biodiesel can even be used as fuel in its pure form (B100) if the appropriate precautions are taken, although it is advisable that the vehicle manufacturer indicates its compatibility.
There are a variety of statements about the use of biodiesel from vehicle manufacturers, with those referring to the warranty being the ones that can cause the most controversy. Vehicle manufacturers offer warranties that cover the materials and workmanship of their products, and these warranties do not necessarily cover damage caused by external conditions, such as fuel used. In the United States, federal law prohibits voiding a warranty just because biodiesel was used, requiring proof that biodiesel is the cause of the failure, and if an engine experiences a failure caused by the use of biodiesel (or any other external, such as diesel in poor condition), the damage will not necessarily be covered by the vehicle manufacturer's warranty.
But it's not B100 (pure Biodiesel) or anything. Biodiesel blends like B20 continue to be the most popular choice among fleets and there are also fleets that want to do more but aren't ready to make the jump to B100, so there is a lot of interest in higher blends in range from B30 to B50, which have cold properties similar to B20 but offer a more drastic reduction in carbon footprint and engine emissions.
Meanwhile, the regulations in Europe indicate that although the mixture of biodiesel in traditional diesel fuels is allowed and encouraged, there are not a large number of locations where you can refuel B100.
All cars on the European and North American market can use biodiesel in the mix to the extent indicated by approved regulations, up to B10 (10% by volume of biodiesel in traditional diesel) in Europe and B5 in the United States. There are also certain manufacturers that authorize the use of blends with higher biodiesel content in their car engines (B20, B30, B40, B50...) DEPENDING ON THE COUNTRY, and even areas of the same country.
Range of Cars compatible with Biodiesel for sale in